code: def __init__(self, creader, condition):
      self.creader = creader
      self.condition = condition
      self._i = 0
      self._find_next()
  
file_path: whoosh/src/whoosh/query/qcolumns.py
imports: from whoosh.matching import ConstantScoreMatcher, NullMatcher, ReadTooFar
  from whoosh.query import Query
label_desc: Use image node_id 1 to create a new ColumnMatcher object from inherited base classes: ConstantScoreMatcher with example: obj = ColumnMatcher(creader, condition)